Frequencies for first 10,000 rows of tway_flo variable in accident dataset :

 Trafficway |
       Flow |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,233       62.33       62.33
          2 |      2,511       25.11       87.44
          3 |      1,110       11.10       98.54
          4 |        114        1.14       99.68
          9 |         32        0.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016